fix(clippy): apply auto-fixable linting suggestions

useragent/lib/providers/connection/bootstrap_token.dart

@@ -1,25 +1,25 @@
-import 'package:riverpod_annotation/riverpod_annotation.dart';
-
-part 'bootstrap_token.g.dart';
-
-@Riverpod(keepAlive: true)
-class BootstrapToken extends _$BootstrapToken {
-  @override
-  String? build() {
-    return null;
-  }
-
-  void set(String token) {
-    state = token;
-  }
-
-  void clear() {
-    state = null;
-  }
-
-  String? take() {
-    final token = state;
-    state = null;
-    return token;
-  }
-}
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'bootstrap_token.g.dart';
+
+@Riverpod(keepAlive: true)
+class BootstrapToken extends _$BootstrapToken {
+  @override
+  String? build() {
+    return null;
+  }
+
+  void set(String token) {
+    state = token;
+  }
+
+  void clear() {
+    state = null;
+  }
+
+  String? take() {
+    final token = state;
+    state = null;
+    return token;
+  }
+}